end Oxygen Gas ly Respiration. 261 



7. 2*1 



s. 236 



9- 256 



10. - - 256 



11. -r - 286 



12. - - 257 



13. ~ - - 168 



3362 



The 13th gasometer was the whole of the last single and 

 forcible expiration ; portions were saved from each of the 

 gasometers, and we first examined the state of No. 1. 

 100 parts contained y carbonic acid, 

 25 azote, 

 66 oxygen. 



100 



The large quantity of azote in this case was a clear proof 

 that our conjecture upon the residual gas in the lungs was 

 well founded. 



We then examined a mixture of No. 2 and 3. 

 100 parts contained 10*5 carbonic acid, 

 10 azote, 

 79'5 oxygen. 



100 



Here the quantity of azote was diminishing, and the ratio of 

 carbonic acid increasing; so that it appears necessary for the 

 lungs to be cleared of azote, before the increased proportion 

 of carbonic acid can take place. 



The 13th or last gasometer was now examined by itself: 

 100 parts contained 12 # U carbonic acid, 

 5-5 azote, 

 82* oxygen. 



100 



Here the proportion of azote was only 3 per cent, more than 

 what existed previously in the gas ; and hence we may con- 

 clude, that even seven minutes and a half was not a sufficient 

 time to remove the azote from the extremties'of the bronchia. 



R3 We 



